Loose leaf binder



-Feb. 28, 1939. P. o. UNGER LOOSE LEAF BINDER Filed June 10, 1935 2 Sheets-Sheet l INVENYTOR PAUL o. UNGER A T TORNEY Feb. 28, 1939. P. o UNGER 2,148,789

LOOSE, LEAF BINDER Filed Jurie 10, 1935 2 Sheets-Sheet 2 (/w FIG.3

FIG. 6 8 22 INVENTOR I PAUL O. UNGER ATTORNEY Patented Feb. 28, 1939 PATENT OFFICE LOOSE LEAF BINDER Paul 0. Unger, Elmhurst, 111., assignor to Wilson- Jones Company chicago, 111., a corporation of Massachusetts Application June 10, 1935, Serial No. 25,697

7 Claims.

This invention relates to loose leaf binders of the type having telescoping back sections and particularly to a binder that may be expanded to reference position without the necessity of manipulating any locking mechanism.

It is an object of this invention to provide simple and efficient means for securinga plurality of sheets in a binder that will permit opening of the binder to reference position without the necessity of releasing the securing means. It is a further object of this invention to provide means for facilitating the telescoping movement of the back sections and to prevent excessive wear at the points of contact of the moving parts. It is a further object of this invention to provide slidable locking means that may bereadily moved to locked or unlocked position and will be positively secured in either position. Other objects of this invention will become apparent upon reading the following description, taken in conjunction with the accompanying drawings, in which Figure l is a perspective view of a loose leaf binder embodying the invention, with portions broken away to facilitate illustration of the structure.

Figure 2 is a fragmentary perspective view of the binder in open position;

Figure 3 is a top plan view of the locking slide and associated mechanism with portions broken away to facilitate illustration of the structure;

Figure 4 is a fragmentary longitudinal sectional view of the locking slide in locked position;

Figure 5 is a view similar to Figure 4 showing the locking slide in unlocked position;

Figure 6 is a front elevation, partly in section, of the binder; and

Figure 7 is a cross sectional view of the binder.

In the drawings, the reference numeral 2 indicates a back section which includes a plate member 3, an outer covering material 4, and a metal plate 5 secured to the plate member I in any suitable manner. The plate member 3 may be formed of binders board, chip board, metal or any-similar material. The outer covering material 4 may be leather, imitation leather or any suitable fabric. All four edges of the covering material 4 are turned in and secured between the plate member 3 and the metal plate 5. The ends of the metal plate 5 are bent'inwardly to form a channel member 6 at each end of the binder. The channel member 8 is provided with a projection I for a purpose hereinafter described.

A second back section 8 is juxtaposed against the plate 5 with its ends received within the channel members 8. The surface of the section 8 lying against the metal plate 5 has secured thereto a layer of covering material 8 similar to the covering material 4 so that when the back sections of the binder are opened the back appearance is not unsightly. One longitudinal edge of the covering material 8 is bent around the corresponding edge of the back section 8, as indicated at Ill. The ends of the section 8 are bent over on the covering material, as indicated at H, to secure the ends of the covering material and to provide a metal to metal contact for the moving parts at the point where excessive wear would otherwise occur. The ends of the back section 8 are each provided with an upstanding projection l2 adapted to engage the projection I when the back sections are opened, to prevent complete separation of the back sections.

The back section 8, a cover member i3 and a post carrying bar 14 are hinged together along the outer longitudinal edge of the back section. The cover member l3 preferably comprises a sheet I5 of binders board, or chip board, an outer covering ii to match the materials 4 and 9, and a hinge plate i'l secured to the board IS in a suitable manner. However, it will be understood that the covers may be flexible and may be formed of leather or any similar material.

The post carrying bar l4 includes a metal strip i8 of substantially the same thickness as the hinge plate I! and the back plate 8 so that the hinge tube [9 formed from sections curled alternately from the strip l8, the hinge plate I! and the back plate 8 is of uniform size. A reinforcing strip 20 is welded or riveted to the strip l8 to make the post carrying bar 14 sufficiently thick to serve its intended purpose. The post carrying bar I4 has rigidly secured thereto a plurality of posts, some of which are preferably hollow, as indicated at 2|, and one or more of which may be solid, as indicated at 22. The diameter of the solid posts is slightly less than the inside diameter of the hollow posts.

The posts 2| and 22 are adapted to have a plurality of sheets 23 impaled thereon. A transfer bar 24 adapted to be positioned on top of the sheets 23 is provided with one or more hollow posts 25 adapted to fit over the solid posts 22, and a plurality of solid posts 26 adapted to be received within the hollow posts 2|. The outer diameter of the hollow posts 25 is preferably the same as that of the posts 2| so that the apertures punched in the sheets 23 may be uniform. The transfer bar is provided with a'plurality of aligning pins 21 and lock studs 28 projecting upwardly from the top of the transfer bar. Preferably the arrangement of sheet retaining posts 2|, 22, 25 and 26, aligning pins 21 and lock studs 28 is such that the transfer bar 24 may be positioned without the necessity of matching one end of the bar with a particular end of the binder.

The back section 2 is provided at one longitudinal edge with an upstanding flange 29 formed integrally with the plate 5. A plurality of integral bracket reinforcements 30 strengthens the bend between the plate 5 and the flange 28. A

plate 3|, coextensive in area with the flange 29, is welded or riveted to the flange 29. A cover member 32, similar to the cover member I3, is hinged to one edge of the plate 3|, as indicated at 33.

A locking slide 34 is mounted on the underside of the flange 29 by means of a plurality of studs 35 which are rigidly secured to the looking slide 34 and pass through elongated apertures 36 provided in the flange 29 and plate 3|. The locking slide is provided with a plurality of key-hole apertures 31 each of which is shaped so that its enlarged portion is adapted to pass over the head of one stud 28 when the locking slide is in the open or unlocked position indicated in Figure 2. When the locking slide is pushed inwardly to the locked position indicated in Figure 1 the narrow portion of the aperture 31 is in engage ment with the neck of the stud 28 and release of the slide is prevented by the head of th stud 28.

One end of the locking slide 34 is bent to form a finger piece 38 to facilitate longitudinal movement of the slide. A detent 39 is struck out from the locking slide 34 and is bent slightly towards the flange 29 to impart the necessary spring effect. The free end of the detent is provided with a projection 40 which is adapted to snap into either of two depressions or recesses 4| or 42 formed in the flange 29 and plate 3! to hold the locking slide in either open or locked position. The spring action of the detent is strong" enough to prevent accidental movement of the slide but not strong enough to interfere with the normal operation of the mechanism.

The locking slide 34 is provided with a plurality of elongated apertures 43 through each of which an aligning pin 21 is adapted to pass. The flange 29 and the plate 3| are each provided with apertures 44 each large enough to receive an aligning pin 21 to cooperate in aligning the locking slide with the lock studs 28. The flange 29 and the plate 3| are also provided with a plurality of apertures 45 adapted to'receive the head of the lock stud 2B. The end of the flange 29 and plate 3| adjacent the finger piece 38 is preferably notched, as indicated at 46, to facilitate manipulation of the locking slide.

From the-foregoing it will be seen that when the locking slide is locked on the transfer bar that the binder may be opened far enough to cause the projections l and I2 to engage each other without releasing the sheets 23 for removal from the binder. This arrangement is advantageous when it is desired to use the binder for reference without releasing the sheets. The extra space obtained in reference position allows much freedom in turning pages and increases the visibility for reading information written or printed near the bound margin of the sheets. When it is desired .to insert or remove a sheet, the locking slide may be moved to open position and any desired portion of the contents may be lifted with the transfer bar and the necessary changes made without disturbing the orderly arrangement of the rest of the sheets.

Although I have described apreferred embodiment of my invention in detail, it will be understood that the description thereof is illustrative, rather than restrictive, as many details may be modified or changed without departing from the spirit or scope of my invention. Accordingly, I do not desire to be restricted to the exact construction described, except as limited by the appended claims. p v

I claim:

1. In a loose leaf binder, a. back plate, the outer exposed surface of said plate having a covering of suitable material, and a pair of flanges bent from said back plate to secure said covering to said back plate and to protect the ends of said covering,

2. In a loose leaf binder, a back plate, guide channels on opposite ends of said back plate, a second back plate movable transversely in said guide channels, and a covering of suitable material on the outer exposed surface of said second mentioned back plate, the ends of said second mentioned back plate being bent around said covering material to help secure said covering material and to protect said covering material from wear.

3. In a loose leaf binder,a metal back member, the ends of said metal back member being bent inwardly to form channel shaped guide members,

a covered member secured in contact with the outer exposed surface of said metal back member, and a second metal back member having its ends fitting within said channel shaped guide members, said second mentioned metal back member being covered on its outer exposed surface and having its ends bent over upon its covering to provide a metal to metal contact within said channel shaped guide member.

4. In a loose leaf binder, a pair of telescoping back sections, a covering of suitable material on the outer exposed surface of each of said back sections, and means for protecting said covering material from frictional engagement during telescoping movement of said back sections.

5. In a loose leaf binder, a back plate, a fabric covered plate secured against the outer exposed surface of said back plate, a pair of channel guide members at opposite ends of said back plate, a second back plate slidable transversely in said channel guide members, the outer exposed surface of said second mentioned back member being covered with fabric, and means integral with said second mentioned back plate for protecting said last mentioned fabric from contact with said channel guide members.

6. In a loose leaf binder, a flanged back member, a locking slide secured to said flange, spring means projecting from said locking slide cooperating with said flange to retain said locking slide in a plurality of predetermined positions, a pair of guide channels on said back member, a second back member slidable in said guide channels, the outer exposed surface of said second mentioned back member being covered with fabric, and means integral with said second mentioned back member for protecting said fabric from contact with said guide channels.

'7. In a loose leaf binder, a pair of telescoping metal back members, a channel shaped guide member on each end of one of said back members adapted to embrace a corresponding end of said other back member, and a covering of suitable material on the outer exposed surface of the telescoping portion of each of said back members, said back members each being formed to provide metal to metal contact where the channel shaped guide members contact with the ends of said other back member.

- PAUL O. UNGER.

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